For example ‘Angry’, occurred more than 500 times in our results and we
thought it would be interesting to see the uptake in the usage of this word
over time. Angry Birds has been released in December 2009, so in the graph
below the relative growth of the occurrence of ‘Angry’ or ‘Birds’ in
applications in the Apple App Store (iPhone and iPad) is displayed over time.

Lot’s of “Angry” apps out there. You could look at this two ways. Either you
want to join in the trend to hopefully show up in an “Angry” search result, or
you want to stand out and be different—you know, like writing a game named
“Raging Fowls”.